link :
TheConversation.Com
… and there was a very interesting episode on NPR radio about a great man in this story :
Clair Cameron Patterson
https://en.m.wikipedia.org/wiki/Clair_Cameron_Patterson
He Triumphs against corporations’ greed in the end 👍.
Wait until OP learns that oil companies covered up their own research which proved they were wrecking the environment with CO2 pollution.
Or that the sugar industry covered up the evidence that sugary food caused the obesity epidemic and they told everyone it was actually fatty foods doing it.